I'm hoping to find a PDF editor, hopefully free, that I can use to crop a line drawing, saved as a pdf. It's supposed to be able to be printed at actual size on A0 size, but officeworks tells me it's too big for A0 and says they're unable to print it over 2 sheets.
Any suggestions please?
That sounds a little strange. The times that I've seen things printed at Officeworks, they print straight from Adobe Reader, which means that they should be "fit" the print to the paper size.
Try: http://www.foxitsoftware.com/PDF_Editor/